An optical fiber ferrule retainer, for retaining a ferrule in a state in which the ferrule is inserted into a ferrule insertion hole in an axial direction of the ferrule insertion hole, comprises: a retainer base part; and a retention member replaceably attached to the retainer base part. The retention member comprises: a tubular sleeve part and a fixing part fixed to the retainer base part; the ferrule insertion hole; a split groove formed in an axial direction of the ferrule insertion hole or in a circumferential direction orthogonal to the axial direction; and a press part that is displaced to be able to press a peripheral surface of the ferrule with a partial inner face of the ferrule insertion hole defined by the split groove. The retainer base part comprises an operation member that applies an external force for displacing the press part, and while the ferrule inserted is retained by pressing of the press part, the fixing part can be removed from the retainer base part to detachably replace the retention member.